can i run a new python script on companion computer (Rpi which is loaded with ardusub O.S) for a sensor data reading?
Did you find the answer you were looking for? I am also looking for this.
Yes, it’s possible!
You can access companion via a SSH terminal, or a file manager that access companion via a ssh connection.
You can check more here: https://www.ardusub.com/operators-manual/companion-web.html